Emergency LED Drivers & Battery Backup Units

Choose an emergency LED driver or integrated battery-backup unit for compatible commercial luminaires. Compare the products below by emergency output, input voltage, fixture type, and installation environment.

These are complete emergency driver assemblies, not loose replacement batteries. For battery-only service parts, use the battery replacement guide and match the original specifications exactly.
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Shop emergency backup drivers by specification

Choose by emergency output, supply voltage, fixture type, and environment. Confirm the exact product’s DC output range, wiring, dimensions, and compatibility before ordering.

Emergency driver comparison

  • LSH-08170-HY — 8W emergency output; 100–347V AC; for compatible downlights, strips, tubes, and fixtures up to 60W.
  • EMWC18W — 18W emergency output; 100–347V AC; wet-location junction-box housing for compatible canopy lights, wall packs, and exterior luminaires.
  • LSED20W — 20W emergency output; 100–347V AC; for compatible general commercial 0–10V LED fixtures; remote test switch and charge indicator.
  • LSUFO-25170-YYII — 25W emergency output; 100–347V AC; self-testing design for compatible UFO high bays.
  • LSA40FY-170 — 40W emergency output; 100–347V AC; 170V DC output for compatible commercial and industrial LED systems.
  • LSUFO-40170-YYII — 40W emergency output; 100–347V AC; IP65 self-testing option for compatible UFO high bays.
  • LSA-40AAAWW-HY — 40W emergency output; 277–480V AC; 310–500V DC output range for compatible high-voltage systems.

How to select the correct emergency backup unit

  1. Confirm the normal supply voltage. Most models here accept 100–347V AC; LSA-40AAAWW-HY is the 277–480V AC option.
  2. Match the LED system. Verify luminaire wattage, normal driver type, DC operating range, dimming method, and wiring against the emergency unit’s instructions.
  3. Choose emergency output. The listed 8W–40W value is emergency power, not the normal wattage of the connected fixture.
  4. Check the application. Use a high-bay-specific unit for compatible UFO fixtures and a suitable wet-location assembly where required.
  5. Verify installation space and environment, including enclosure dimensions, mounting location, ambient temperature, moisture exposure, and access to the test switch.
  6. Confirm certification markings and project requirements for the exact model, including approval by the authority having jurisdiction where required.

Emergency driver versus replacement battery

An emergency LED driver is a complete backup-power assembly that monitors normal power, charges its internal battery, transfers to emergency operation, and supplies controlled output to a compatible LED load. A replacement battery is only the battery pack inside an existing exit sign, emergency light, ballast, or driver. They are not interchangeable categories.

If an existing unit has failed, identify whether it uses a replaceable battery or requires replacement of the complete listed driver assembly. Check the fixture label, manufacturer model, wiring diagram, battery label, and installation manual. For more detail, read Emergency Ballasts and LED Drivers: Selection, Replacement and Compatibility.

Installation and commissioning

Emergency drivers are hardwired life-safety components. Qualified personnel should install them according to the product instructions, applicable electrical requirements, and the approved emergency-lighting design. Follow the exact model diagram for the unswitched supply, battery sequence, test switch, indicator, output leads, grounding, and control conductors.

After installation, allow the specified charging period, complete the manufacturer’s commissioning procedure, verify automatic transfer when normal power is interrupted, and confirm the intended emergency illumination. See the installation, wiring, and testing guide for a conceptual overview.

Frequently asked questions

Are these loose emergency-light batteries?

No. The products currently in this collection are complete emergency LED driver or battery-backup assemblies. Their internal batteries are part of a matched system.

Can I choose a driver by emergency wattage alone?

No. Input voltage, DC output range, fixture wattage, normal driver, dimming controls, enclosure, ambient conditions, and manufacturer compatibility requirements all matter.

What does 90-minute operation mean?

These products are described for emergency operation lasting up to or at least 90 minutes under specified conditions. Acceptance depends on correct installation, charging, load compatibility, testing, and project requirements.

Which model is intended for high-voltage 480V systems?

LSA-40AAAWW-HY is the collection’s 277–480V AC input option. Confirm the connected fixture and its 310–500V DC output requirements before ordering.

Which units are intended for UFO high bays?

LSUFO-25170-YYII and LSUFO-40170-YYII are the dedicated 25W and 40W high-bay choices. Verify the fixture, emergency-output target, dimming, environment, and installation requirements.

Where can I learn about UL 924?

Read UL 924 Emergency Lighting and Exit Sign Requirements Explained. Always verify the certification mark and listing information on the exact product supplied.

Related emergency-lighting products

For complete fixtures and signage, browse emergency lights with battery backup, self-testing emergency lights, battery-backup exit signs, and combo units.